what's the best/ strongest ct9 manifod

[mad 4 tar tobin]

i have cracked two different manifolds? i cracked a mild steel wepr one and a stainless steel one i cant understand why? Everyone told me wepr are the best but why do mine keep cracking? the mild steel one i had on the car for a long time before it cracked but the stainless steel one was only on it a month or two? why wud they b cracking my decat is braced to the engine. i am running a ct9 hybrid @ 1 bar. can sum1 help? what do i do next?

 

[mad 4 tar tobin]

what are better zisco or wepr?

 

[JohnOBrien8]

wepr and zisco seem to be the pick of the bunch mate!
I havent heard of a ported standard mani cracking!

 

[Paul_JJ]

Mate I had loads of problems with mani as well. You need to get to a very good mechanic and he will sort you out! The cat could be restricting the flow if you have one! I can recommend you my mechanic but he is in MK, not Ireland -)

Try Zisco - buy brand new one, so you will get the warranty and get it professionally installed!!!

 

[pilgrim_fgau]

get a dremel and port your own oem mani, 9/10 it wont crack, if it does, pick up another 1 for pennies and port it too... I cant justify paying big bucks for a manifold, that has very very little if not any gains over a ported OEM mani

Ive also cracked 2 manifolds but never had a bother with the 2 ported manifolds on my glanza and GT.

 

[akyakapotter]

I agree go oem ported mani I've done it and it's been fine take your time doing it or get some one to do it for you

 

[cheshireglanza]

get your standard mani ported that will sort your problem

 

[Arnold]

No problems with my Wepr mild steel. Got any photos of yours?